How to add stormpath with React PropTypes? index.js ``` import App from '../components/App'; import WelcomeRoute from './Welcome'; import SettingsRoute from './Settings'; import CampaignRoute from './Campaign'; export default { path: '/', component: App, indexRoute: WelcomeRoute, childRoutes: [ SettingsRoute, CampaignRoute ] }; ``` App.js ``` import React, {PropTypes} from 'react'; import Header from '../../components/Header'; import MessagesStack from '../../components/MessagesStack' const App = ({children}) => ( <div> <Header /> <section className="ui main container"> <MessagesStack /> {children} </section> </div> ); App.propTypes = { children: PropTypes.element.isRequired }; export default App; ``` I tried to change Router to react-stormpath but it now gives me a blank page.